<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>ES8 对象方法扩展</title>
</head>
<body>
    <script>
        //声明对象
        const school = {
            name:"尚硅谷",
            cities:['北京','上海','深圳'],
            xueke: ['前端','Java','大数据','运维']
        };

        //获取对象所有的键
        // console.log(Object.keys(school));
        //获取对象所有的值
        // console.log(Object.values(school));
        //entries
        // console.log(Object.entries(school));
        //创建 Map
        // const m = new Map(Object.entries(school));
        // console.log(m.get('cities'));

        //对象属性的描述对象
        // console.log(Object.getOwnPropertyDescriptors(school));

        // const obj = Object.create(null, {
        //     name: {
        //         //设置值
        //         value: '尚硅谷',
        //         //属性特性
        //         writable: true,
        //         configurable: true,
        //         enumerable: true
        //     } 
        // });
    </script>
</body>
</html>